Baking oven



Jan. 19, 1932. L D, Hows Q 1,841,813

BAKING OVEN Filed Jan. 19, 1931 2 SheetsSheet l Z/ 2%! 9 J 3% vent o1,

Jan. 19, 1932. LDH 1,841,813

BAKING OVEN Filed Jan. 19, 1951 2 Sheets-Sheer 2 Patented Jan. 19, 1932 UNITED STATES PATENT OFFICE Application filed January 19, 1931. Serial No. 509,766.

This invention relates to new and useful may be contained within the oven and the im rovements in baking ovens. heat conserved. Asbestos fibre or by-prodne object of the invention is to provide an ucts having heat insulating properties, or improved oven wherein the heat will be more any other material suitable for the purpose evenly distributed and better conserved. may be used. 55 A particularobject of the invention is to In constructing the oven, 1t 1s given any provide an oven comprising inner and outer suitable shape and for the purposes of illusmetallic shells completely insulated from tratlon I have shown the forms set forth in each'other so as to prevent heat exchange. Figures 1 and 2. In order to, easily transport Another object of the invention is to prothe oven and assit through narrow doorvide inner and outer metallic shells having Ways, it is ma e in sections; but the particua heat insulating packing therebetween and lar shape and arrangement of these sections connected by non-metallic members. is largely a matter of choice and mechanical A construction designed to carry out the indesigning. vention will behereinafter described together In Figures 1 and 2 the oven is composed of 65 with other features of the invention. top sections A and B extending longitudi- The invention will be more readily undernally of the oven and quadrant shaped in stood from a reading of'the following specificross section. These top sections are mountcation and by reference to the accompanying ed on vertical side sections 0 and D between drawings in which an example of the invenwhich end sections E are disposed. The end tion is shown, and wherein: sections and the ends of the side sections are Figure 1 is a transverse vertical sectional mounted on transverse base members or botview of an oven constructed in accordance tom supports 14. The sections are matched with the invention, together and connected by gusset plates 15 Figure 2 is an isometrical view of the same, suitably bolted thereto. As before stated Figure 3 is a partial longitudinal sectional the exact sectional divisions are subject to view of the oven, variation and the invention resides in the Figure 4 is a sectional detail of the base structure of the walls rather than in the sec- Joint, tional divisions. 30 Figure 5 is an enlarged sectional view taken The sections A, B, C and D each comprise on the line 55 of Figure 1, an lar corner members 16 bent to the shape Figure 6 is an enlarged vertical sectional necessary for theparticular'section. In each View taken on the line 66 of Figure 1, section the cdrner members are connected by Figure7 is a'horizontal cross-sectional vlew andv overlap longitudinal outer metal sheets 35 take? 1 ne 7- of Figure 2, 0 17 bent to fit said members. The upper and g re 8 1 a v t q 580151011811 Vl w taken lower ends of the corner members 16 are conon the lme 8-8 of Figure 6, and nected by longitudinal angle bars 18, which F gu e 9 1s an lsometrwal vlew of ne of t e are suitably welded or otherwise fastened to 1 5801310113! the corner members so as to form a butt- 40 In the drawings the numeral 10 designates joint therewith/ The top sections A and B inner metallic shell pr lining and 11 an have outer meta-l end, sheets 19 conforming outer metalllo Shell 01' J cke These h lls to the shape of the corner members and seare preferably formed of sheet metaland are} cured to the u right angle bars 20 and horispaced apart so as to provide suitable walls zontal bottom hars 21.- The metal sheets 17 45- and cav ties for the reception of insulating and 19 form art of the out shell 11,1 'material 13, which is packed in: the spaces 7 The side sections Cand Dhave outer metal between the walls. This insulating-material I sheets-22 at their ends shaped'to. fit the cormay be of any sultable character and is used nermembers 16 of said sections and extendfor the purpose of preventing heat exchange ing into top angle bars 23 andupright' angle a 50. so that an even and constant" temperature bars 24. The anglabars 23 are fastened to D through in the erected. The sections also make for easy *the plate the corner members flush therewith and the angle bars 24 are fastened flush with the bars 23 at their upper ends. The lower ends of the bars 16 and 24 are suitably fastened in flush relation and are seated in the base members 14. The base members are connected by tie bars 25 which support a transverse bottom sheet 26 and upon which a sheet or plate 27 of insulating material is mounted. As is shown in Figures 1 and 4, the bottom angle bars 18 of the sections C and D rest upon the plate 27.

'It will be seen that the plate 27, bein a non-conductor of heat, heat exchange %]6- tween the metal parts of the sections 0 and D and the base parts 14 and 25 is prevented. It is further pointed out that the plate 27 is composed of. a suitable fire-proof material which is also a non-conductor of heat and of course is non-metallic. In the section C an intermediate angle bar 18 is fastened to the corner member 16 and a suitable door 28 is hinged thereto, as is shown in Figures 1 and 2.

The sections E include rectangular metal frames 29, angular in cross-section like the bars 21 and 24, and each frame receives an outer metal sheet 30 forming part of the outer shell 11. When the sections are assembled, the lower sections C, D and E rest upon 27, which is carried by the base members 14 and the bars 25, and the upright angle bars 24 engage and lie 'fiush with the upri hts of the frames 25. The bottom bars 21 o the top sections lie flush with and rest upon the top bars 23 and the top bars of the frame 29, while the upright bars 20 of the top sections contact with, each other and lie flush.

From the foregoing it will be seen that the oven, being constructed in a number of sections, each of said sections ma be passed a narrow doorway or ot er opening building in which the oven is to transportation. When the sections have been delivered they may be assembled and fastened with the'gusset plates 15.

The inner shell 10 is cut to conform to the sectional divisions and it is believed that a description explain all. The, inner metal sheet 10 is spaced a substantial distance from the outer metal sheet or shell 11, as before described. To hold these sheets in spaced relation l pro- .vide s acers or braces therebetween, as

shown in Figure linfull and dotted lines, and such spacers may be located at such points as are found desirable and advantageous. It is preferableto stagger these spacers so that they 'Wll]. prevent the packing 13 settlin and will also support it in. place.

Eac spacer com rises a strip 31 of nonmetallic material w ich is preferably of fireproof character and likethe plate 27 may be be bers of t detail in Figure of'one section will properly made of any substance suitable for the purpose; a pressed asbestos composition having een found satisfactory. The strip is connected to the outer shell 11 by an an ular clip 32 suitably 33 and to the shell by bolts 34. A similar angular clip 35 (Figure 4) is secured to the opposite side of the strip by bolts 36 and overhangs the edge of the strip so as to engage the inner side of the inner shell 10 to which it is secured by screw bolts 37. This enables the packing material 13 to be inserted and the inner shell 10 afterwards placed in position.

The margins of the sections are formed by securing strips 38 of non-conducting material similar to the strips 31 to the angle bars 18. 18, 20, 21, 23, 24 and the frame 29, as is indicated in Figures 4, 5 and 9, as well as in other figures of the drawings. One side of the strip 38 is fastened to the bar by bolts 39. On the opposite side each strip 38 has an overhan ing metallic clip 40 fastened thereto by a olt 41. The edge portion 42 of the inner shell 10 is crimped around the clip 40 so that the margin of the shell section is thus secured in place. The strips 38 hold the packing 13 in the sections and they also provide non-metallic connections between the inner and outer shells. When the sections are assembled fire-proof cement 13', as is shown in Figure 5, is filled in between the abutting edges and this cement being of heat resisting material, is also a non-conductor of heat. The cemented joints co-act with the gusset plates 15 in holding the sections together.

A baking reel 43 is mounted on a longitudinal shaft 44 which projects through the end sections E and is journaled in bearing boxes 45 mounted on brackets 46, which in turn are fastened on upright standards 47 extendin from the top to the bottom memie frame 29 and suitably fastened thereto in butt-joint relation. As shown in 6, each standard 47 has an inwardly directed collar 48 on its inner side which is surrounded by a box 49 of non-conducting material like the strips 38. The box is fastened to the collar by bolts 50 and has bolted on its inner end a clip 51 which extends inwardly of the box. he inner shell 10 is cut and provided with a flange 52, which is crimped around the inner edge of the clip 51.- so as to provide a circular opening for the shaft 44. A non-metallic ,washer 53 is inserted in'the box against the collar and fits snugly around the shaft 44 so as to retain the packing material 13'which is placed inthebox.

It will'be seen that the inner and outer shells are thoroughly insulated from each other and the wholestructure is such as to conserve the heat. I have shown burners 54 in the bottom of the oven, but the manner fastened to the strip by olts of heating is not within the scope of the invention.

WVhile I have described the outer shell 11 as being made of sheet metal, I do not wish to so limit the invention, and it is to be understood that the outer shell 11, of which the outer panels of the sections are formed, may be made on non-metallic material, such as compressed asbestos board or other sheet material which is a non-conductor of heat.

While the invention has been illustrated in connection with a baking oven, it is to be understood that the invention may be applied to any heat exchange device.

Various changes in the size and shape of the different parts, as well as modifications and alterations, may be made within the scope of the appended claims.

Having illustrated and described a preferred form of the invention, what I claim is:

1. In a baking oven, an inner metallic shell, an outer metallic shell spaced from the inner shell, non-metallic connections between the shells, heat insulating packing between the shells, the oven consisting of a base and an upper structure, and a horizontal nonmetallic plate mounted on the base and on which the upper structure is supported.

2. A baking oven as set forth in claim 1 in which the upper structure is formed into sections having angle marginal members, and means for securing the angle members together.

3. In a baking oven, a pair of longitudinal top sections including arcuate tops and rightangular ends secured thereto, vertical side sections including angular ends on which the top sections are mounted, upright end sections between the ends of the side sections and on which the top sections are mounted, means for securing the top sections together, means for securing the top sections and the end sections together, and 'means for securing the top, end and side sections together, all of said means being removable, whereby said sections may be separated.

4. An oven as set forthin claim 3 in which each section is formed of inner and outer metallic sheets and connected by non-metallic members at their margins.

5. An oven as set forth in claim 3 and a base, and means for securing the side and end sections to the base.

6. An oven as set forth in claim 3 in which each section is formed of inner and outer metallic sheets and connected by non-metallic members at their margins, a base, and a non- 'metallic plate mounted on the base transversely thereof and upon which the side and end sections are mounted.

7. In an oven, insulated walls including innerand outer metallic sheets connected by non-metallic strips, inwardly directed collars at each end of the oven, the inner sheet hav ing an opening opposite each collar, a reel shaft passing through the collars and the LOUIS D. HOULIS. 

